The phrase "age of humanity" is correct and usable in written English.
It can be used to refer to a specific period in human history or the current state of human existence.
Example: "In the age of humanity, we face unprecedented challenges and opportunities that shape our future."
Alternatives: "era of mankind" or "epoch of human existence".
The Church of Yeezianity proudly proclaims itself 'THE BEST CHURCH OF ALL TIME!!!!!' on its official website, detailing in its About section: "We are an anonymous group who believes that the one who calls himself Yeezus is a divine being who has been sent by God to usher in a New Age of humanity".
Every age of humanity inherits a prophet who has witnessed the violent, shuddering cataclysm of the world's end.
What is implausible to any given age of humanity may become established fact to some successive generation.
We're living in the anthropocene -- the age of humanity -- and it's about time that we work hard to make this epoch the "compassionocene" and stop blaming our violent behavior on other animals.
Bahá'u'lláh wrote of the need for world government in this age of humanity's collective life.
During a keynote at the IFA in Berlin, Eric Schmidt topped off presentations on Voice Powered Search, Street View Search and Google TV by emphasizing how much Google values being fast and that current technological advancements are nearing the realm of science fiction, or what he called, "The age of augmented humanity".
This is the age of digital humanities, brothers and sisters, of Kickstarter-funded bestsellers, of crowdsourced editing, and of boutique online publishing services providers.
But for aging sinners and saints alike, it's a necessary act of humanity in the end.
In Paris, humanity has demonstrated that the "age of the human" won't necessarily lead to an age of destruction.
The remarkable growth in human knowledge and technological innovation offers real hope for defeating the age-old enemies of humanity: poverty, famine and disease.
Perhaps we do live on the verge of a new age, of another transformation of humanity.
